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Materials Development Division
Hydrogen Functional Materials “HYDRIDE” Researches for Energy Applications

Our division is engaged in researches on ”HYDRIDES” for energy applications. The main subjects are the development of high-density hydrogen storage materials for fuel cell applications, lithium/sodium fast-ionic conductors for battery applications and superconducting materials. The primary objective is the development of novel hydrogen storage materials for automotive applications, using multiple cutting-edge techniques for atomic/electronic characterization and first-principles calculations. In addition to the hydrogen storage materials, we are engaged in the development of fast-ionic conductors and the implementation of them into next-generation energy devices.

Prof. Shin-ichi ORIMO Prof.
Shin-ichi
ORIMO(WPI)

Assoc. Prof.
Shigeyuki TAKAGI

Assist. Prof.
Toyoto SATO

Hydrogen diagram (top) illustrating the bonding flexibility of hydrogen with a tetrahedron; the spheres located at each vertex represent a proton (H+), a hydride ion (H-), covalently bonded hydrogen (HCOV.) and neutral hydrogen (H0). Novel complex hydride Mg3CrH8 with coexistence of H- and HCOV. (bottom right) synthesized by high-temperature high-pressure apparatus utilizing cubic-type multi-anvil press (bottom left).

Hydrogen diagram (top) illustrating the bonding flexibility of hydrogen with a tetrahedron; the spheres located at each vertex represent a proton (H+), a hydride ion (H-), covalently bonded hydrogen (HCOV.) and neutral hydrogen (H0). Novel complex hydride Mg3CrH8 with coexistence of H- and HCOV. (bottom right) synthesized by high-temperature high-pressure apparatus utilizing cubic-type multi-anvil press (bottom left).

Bulk-type all-solid-state lithium-sulfur battery using LiBH4 electrolyte (top, collaboration with Mitsubishi Gas Chemicals Co., Ltd.) and sodium fast-ionic conductivity of Na2B10H10 (bottom, collaboration with Graduate School of Engineering, Tohoku University, and NIST (USA)).

Bulk-type all-solid-state lithium-sulfur battery using LiBH4 electrolyte (top, collaboration with Mitsubishi Gas Chemicals Co., Ltd.) and sodium fast-ionic conductivity of Na2B10H10 (bottom, collaboration with Graduate School of Engineering, Tohoku University, and NIST (USA)).

 

Keywords
high-density hydrogen storage materials, superionic conductors, next generation batteries